Single-trigger mechanism.



PATENTED JAN. 2'7, 1903.

L. HENRY. SINGLE TRIGGER MECHANISM.

APPLICATION FILED JULY 29, 1902.

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PATENTED JAN. 27, 1903. 4

L. HENRY.. SINGLE TRIGGER MECHANISM.

APPLICATION IILBD JULY 29, 1902.

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- barrel has been fired and immediately before scars, and the position of the bar under the NITED -.TATEs LORENZO HENRY, OF LONDON, ENGLAND.

SING LE-TRIGG E'R MECHANISM SPECIFICATION formingpart of Letters Patent No. 719,331, dated January 27, 1903. Application filed July 29, 1902- Serial No. 117,475. (No model.)

To all whom it may concern; 7

Be it known that I,'LoRENzo HENRY,-gensiding at 79 Grosvenor street, London, W., England, have invented a certain new and useful Improvement in Single-Trigger Mechanisms, of which the following is a full, clear, and exact description, and for which I have applied for Letters Patent in Great Britain, dated December 23, 1901.

This invention relates to an improved single-trigger mechanism for double-barreled firearms, and is applicable to either hammer' or hammerless guns.

The invention consists, essentially, of a transverse sliding bar mounted in supports secured upon the trigger-blade and capable of protruding from either side of the blade under the sear of the hammer on that side, so

that when the trigger is pulled and the trigger-bladeraised the corresponding hammer will be released, and when the sliding bar has been brought backand projected from the opposite side of the trigger-blade and the latter is again raised the other sear.will be raised and its hammer released.

A further portion of my invention consists in a device which latches the aforesaid sliding barin position, this latching device being depressed and the bar consequently freed either by automatically striking the top action-plate immediately after the first barrel has been fired or by a separate hand-operated device for cutting out the first barrel when it is desired to fire only the second. 1

The invention is illustrated upon the accompanying drawings, in whioh'- Figure 1. is a longitudinal elevation of the lock of the gun, both lock-plates being removed. Fig. 2 is an elevation of the triggerplate seen from the other side and removed from the lock of the gun. Fig. 3 is a plan of Fig. 2. Figs. 4 and 5 are similar views to Fig. 3 and show the successive movements of the sliding bar. Figs. 6, 7, and 8 are end elevations of the rear portions of Figs. 3, 4, and 5, respectively. Fig. 9 is an end view of the lock of the gun, showing the lock-plates, the

left sear. Fig. 10 is a similar view, bnt'shows the arrangement of the parts after the left the latch has struck the top plate a second time. Fig. 11 is a similar view to Figs. 9 and 10, but shows the sliding bar under the ight sear ready, to fire the right barrel. Fig; 12 shows in elevation a device for cutting out thefirst barrel when it is'desire'd to fire only the second barreL' Fig. 13 is a planet the ordinary thumb-lever for breaking open the gun and fitted with connections for setting the transversesliding bar. Fig. 14 illustrates the movements of the parts shown in Fig. 13.

Fig. 15 shows in longitudinal section the slide under the thumb-lever. Fig. 16 is a longitudinal elevation of the transverse sliding bar. Figs.'17 and 18 are front and rear elevations of the sliding lat-chi Fig. 19 shows the sliding latch in itsintermediate position.

On the annexed drawings I have shown my invention applied to a double-barreled gun 'in which the'leftbarrel is fired first. Obviously, however,'thedevice may be so constructed that the right barrel is fired first, 1 Upon the box a of thin trigger-plate b a trigger-blade o is pivoted at a. On the blade 0 'at its rear are screwed or secured side plates d d, and in these side plates is mounted a transverse slidin'g bare, having anapproximately central collar f. This bar e is of such either side of the plates d d, its stroke being limited by the collar f, and when one end is length that it oan project outwardly from projecting fully on one side its other end is approximately flush with the other side, as will be clearly understood from Figs. 3, 4:, -5 and 6, 7, 8.

Upon the bar e is mounted a'coil-spring f, which is shown in Figs. 3 and 6 compressed between the collar f and the lelt side plate (1, so that this spring normally tends to drive the bar e out from the right-hand side, as

shown in Fig. 8.

Upon the trigger-blade c ispivoted at c a bell-crank lever,'one arm 9 of which engages with a hole in the collar f. By suitably'operbe understood that the bar e can be driven out, so as to project f m the left side plate d, and when this arm g is freed unless the.

barb is held the spring f will drive the said bir e in the opposite direction. Various m ans. may be employed to actuate this arm g, operated either directly or indirectlyps1 'ating the other arm 9 of the bell-crank it will themechanism of the locking-bolt of the gun.

. As anexample I have shown at Fig. 2 a slide h secured to the box a on the trigger-plate by means of a screw working in a slot it, this slide having at one end an arm 2', fitted with a rod 2', on which is mounted a coiled spring k. The slide h at its other end can bear against the lever-arm g, and it will be evident that if the slide it be pushed back the bell-crank lever will be op'e. ted and its arm 9 moved across the trigger-blade from' the position shown in Fig.5 to that shown in Fig.3. The

'slide it may be operated in any suitable manner and is here shown actuated by the ordinary locking-bolt "Z, operated by the usual thumb-lever Z in the usual manner.

'The spring 7; is mounted fo'r only a portion of its length on the rod 2" and is continued beyond the rod and through the box a of the trigger and bears againstthe blade above the pivot a, as shown in Fig. 1. This spring 70 therefore acts as thetrigger-spring and replaces the ordinary leaf-spring for the trigger.

Theworking oflhe thumb-lever and of the locking-bolt is illustrated and will be perceived fromFigs. 13, 14, and 15. The upper part of the action-plate a is grooved longitudinally, and aslide-bolt'm isflcapable of sliding in thisgroove. The thhmb-lever Z is fulcrumed eccentrically at -LZ, and the screw m, by which the lever Z is secured in position, is screwed into a boss m, upstanding from the slide m. The slide mis also rigidly connected, by means of a screw or rivet n, with the arm n of the ordinary locking-bolt Z. The arm n is extended r'earwardly of the locking-bolt Z as a rod 0, journaled and slidable in a hanger 0, secured to the underside of the action-plate a, the arm n and rod 0 be-' ing rigidly connected together; A coiled spring 0 is mounted upon the rod 0 and tends to return the thumb-leverZ and locking-bolt Z to their normal positions, as shown in Figs. l'-and 13. It will t'h us be seen that when the thumblever Z is moved sidewi'se in the ordinary manner tobreakopen-the gun-('see-Fig..

' 14) the slide-bolt n is drawn rearward, and this by means of arm 'n and bolt Zpushesthe slide 71 rearwardly, (compressing spring 10,) and the slide it acting on lever-arm g the other lever-arm 9 will carry the sliding bar 6 over: to the position shown in Fig. 3, thespring f being compressed u-pou tne'bar c. When the gun has been loaded and the thumb-lever Z returned to its normaLposition, Fig. 13, .the. slide It will be returned to the position indicated in Figs. 3, 4, and 5 by means of the,

' spring 76., Thotransverse sliding bar e being held in the=position of Fig. by adatchhereinafter described, upon pulling the trigger the bar 6 will be raised with the trigger-blade and will raise the left sea-r,th,ereby discharging the left barrel and when-this latch has been di sengaged the bar 2 will be freed andfinaliypass to the. position of Figs. 5 and '11. Upolrpulling the trigger-a second time, there- I 'fore, the right sear will be raised and the right barreliired. I have, however, shown fitted to the. mechanism a latch, which arrests the transversemovement of the sliding bar e at about the middle of its passage across the plates d d, mounted-on the trigger-blade, and which latch is disc-n aged from the bar a only after the first barre has been fired.

The left-hand side plated on the triggerblade is prolonged upwardly and is grooved on both faces. The outer face receives the sliding latch 10, the edgesof which are preferably beveled 05,3216 theedgesof the groove in which it travels are correspondingly undercut, so as to hold. the beveled edges of the said latch. The inner groove of the extension d is fitted with a guide-rod q, upstanding from the extension (1 and fitted with a coil-spring q. The latch 12 is provided with a recess 0' near its lower part. Its upper part is rounded 0H? and its rear side is provided with a block 19, hollowed out and capable of engaging and sliding upon the aforesaid guiderod g. If the latch is depressed, th'ehlock 19 travels in the groove upon the inner face of the extension d, as clearly shown in Fig. 2. The latch 19 is shown separately in front and rear elevations in Figs. 17 and 18.

The transverse sliding bar a, which is preferably of round section, is shown separately at Fig. 16. It will be seen that its end toward the left of the figure is provided with a recess r upon its upper side, forming a hook 7' and boots 8 and e upon its lower side, the bent 6 being shown inclined and the bent e being nearer the collary". The hook of the bar (2, the bent e, and the bent 6 thus form three steps for engagement with the base 01' ledge 'L of the recess 1). The recess 19 in the latch 11 thus engages the bent 6, while the-bar e is in position for firing the first barrel, Fig. 6, and the bent a when the bar is in the intermediate position, Fig. '7. porarily freeing the bar 6 by its upper rounded end striking against the under side of the action-plate a.when the trigger-blade is ,raised. The spring acts upon the block 19, and this tends to force the latch upward. -In=-thc positioh shown in Fig. l the ledge 1' engages the bent e", as' will be seen by com- The latch 12 is depressed, thereby temger the-pivoted trigger-blade is raised and the left sear s lifted by the left-hand end of the bar 0. The raising of the left sear effects the discharge of the left barrel and the latch strikes against the under side of plate c. This strikingaction depresses the latch pin-its slide or support 6, and the ledge o is forced out of the bent e. The spring-f, acting on the collar f, thereupon drives the bar toward the right; but the hook or projection ruponthe bar e meets the flange of the left sear, as will be understood from Fig. 9. The ledge-v of the latch now engages the incline 0f the bent-e ifsee Figs. 7 and 19,) and when the trigger-blade is lowered sufficiently the projection T will be disengaged fromthe sear and the ledge n will enter the bent c farther. The rebound of the gun from the shoulder (due to the discharge of the first'barrel) takes,

place. immediately, and the latch 19- again striking the plate a" during this involuntary pull upon the trigger the ledge r is depressed out of the second bent e, the springf, which still acts on the collarf, tending to drive the wholly released from thelatch p meets the face of the right sear s, and when the trigger-blade falls, owing to the trigger being released, the bar e falls therewith, making rubbing contact with the right sear 5, until it assumes the position shown in Fig. 10, when the spring f is free to thrust out the bar e to its full extent-i e., as fully as is permitted by the collarf -under the right sear. Upon again pulling the trigger the right sear s will be raised and the right hammer fired.

The l0ck-plates,,the hammers, and their sears may be of the usual construction, so that they neednot be further referred to.

.The sears .s and 8', however, are shown with-' out the usualinwardly-projecting tails, since I find the tails are unnecessary with my single-trigger device.

In case it should be desired to fire the second barrel only and without previously firing the first barrel I arrange athumb-piece or slide t upon the plate a, covering a slot t in the said plate and rigidly connected with a stud u of suitable depth by means of apin u.

This stud is normally out of contact with the latch p;-but if instead of raising the triggew';

blade to meet the action-plate a the thumbpiece I and stud u bepnlled back the said stud will depress the latch sufficiently to free the bar e and allow it to project under the right sear, thus cutting out the left barrel. The lower position of the latch 13 is shown in dotted lines on Fig. 12, and the thumb-piece will then be returned to its normal position.

Having thus described my invention, what I claim as such, and desire to secure by Letters Patent, is-

1. In a single-trigger mechanism, the combination with the sears and a trigger-blade fast to a trigger, of a sliding bar transverse of and in partprotrusile'from said blade, aspring encircling said bar and tending to force it to one side, and means operated by the movement of the trigger for forcing it toward the other side against the tension of the spring, substantially as described.

' 2. In single-trigger mechanism the combination with the sears and a trigger-blade fast to a trigger, of side plates secured upon said blade, a sliding bar mounted transversely in said side plates, a collar upon said bar, and a spring bearing on said collar and a latch for holding and releasing said bar.

3. In single-trigger mechanism, the combination with the sears and a trigger-blade fast blade, a sliding bar mounted in said side plates and m ovable transversely of said blade, a collar upon said bar, a coiled spring upon said bar bearing on said collar and a bellcrank lever pivoted upon-said blade, said bellcrank lever having an arm which engages the collar-upon said bar and a slide adapted to operate said bell-crank lever. 4. In single-trigger mechanism, the-combination with the sears and a trigger-blade fast to a trigger, of a box on the trigger-plate'to which said trigger-blade is pivoted, side plates ed in said'side plates transversely ofusaid blade, a collar 'on said bar, a coiled spring upon said bar bearing upon said collar,'a bellcrank lever pivoted upon said blade, one arm and the other arm being movable by a slide slidable on said triggenbox.

5. In single-trigger mechanism, the combination with the sears and a trigger-blade fast to .a trigger, of a box on the,triggerplate to which said trigger-blade is pivoted, side plates upon said blade, a sliding bar mounted in said side plates transversely of said blade, a collar on said bar, a coiled spring upon said bar bearing on said collar, a bell-crank lever pivoted upon said blade, one arm of said bellcrank lever engaging the aforesaid collar on said'bar and the other projecting into the path of a slide secured upon said trigger-box, and an arm to said slide said arm engaging the locking-bolt of the gun.

6. In sin gle-trigger mechanism, the combination with'the scars and with a trigger-blade ,fast to a trigger, of a box upon the triggerplate to which saddtrigger-blade is pivoted, side plates upon said blade, a sliding bar mounted in said side plates transversely of said blade, at collar-on said bar, a'coiled spring upon said bar bearing against said collar, a bell --c'ranklever pivoted upon said blade, whereof one arm engages the aforesaid collar and the other is movable rearwardly by a slide secured upon said trigger-box, an arm to said slide, a guide-rod from said arm, and a coiled spring upon said guide -'rod, said spring extending through the aforesaid box on the trigger-plate andbearing against said trigger-blade above the pivot of said blade.

7. In single-trigger mechanism, the combination with the sears and witha trigger-blade fast to a trigger, of side plates secured upon said blade, a sliding bar mounted in said side plates transversely of said blade, a collar upon said bar, a coiled spring upon said bar bearing onsaid collar, bents upon one end of said her, a grooved support upstanding from said trigger-blade, a latch secured in said grooved support, a spring upholding said bents in said sliding bar may be engaged.

v 8, In single-trigger mechanism, thec ombination with the scars and with a trig de secured upon said blade, a sliding bar monnt-.

latch, and a recess in said latch whereby the to a trigger, of side plates secured upon said of said bell-crank lever engaging saidcollar fast to a trigger, of. side plates secured upon said blade, a transverse sliding oar mounted in said side plates, a collar upon said bar, a coiled spring upon said bar bearing on said collar, bents upon the under side of saidbar, a transverse groove upon the upper side of said bar, an upstanding projection upon the end of said bar formed by said groove, 3. hollow in the sear with which said projection engages, a support from said trigger-blade, a latch slidable in said support, a spring upholding said latch and a recess in said latch whereby the bents in said bar may be engaa'ed.

9. In single-trigger mechanism, the combination with the sears and with a trigger-blade fast to a trigger, of side plates secured upon said blade 'a sliding bar mounted in said side trigger-blade,a spring-impelled latch secured in grooves in said support, a recess in said latch capable of engaging thebents in said bar, and a slidable thumb-piece upon the upper lock-plate having a dependent stud movable with said thumb-piece, and capable of engaging and depressing said latch.

In Witness whereof I have hereunto set my hand in presence of two witnesses.

LORENZO HENRY. \Vitnesses:

VICTOR F. FEENY, VICTOR I. FEENY. 

